Wow, I'm really impressed with the number of quick and helpful responses. I appreciate them all.
The diversity of opinion on the optimal processing treatment reflects the path I myself have wandered down to get to this point. It was time to get some more eyes and minds involved, to see if maybe a consensus would emerge. Not yet, apparently!
Mike, I see your point about the bright area on the right, and have gone back and forth on that myself. On the one hand, there's the useful guideline to avoid drawing the eye out of the frame, and part of me says get rid of it. On the other hand, the sunny patch was actually there, adding rather than detracting from the scene at the time; and part of me likes its contrasting warmth against the coolness of the sky. Sitting as it does in the area near the other focal point, the trees, seems to be a suitable place for the eye to come to rest. But maybe its brightness causes that to happen too soon.
How best to render the green field at the bottom, in terms of amount, brightness, contrast, etc., is something else I have played with extensively. I settled on this version, but will look again with fresh eyes.
I'll ponder the suggestions and come back with another version a little later for comparison. In the meantime, any further thoughts are most welcome.